PSY333H5 Lecture Notes - Lecture 6: Left Ventricular Hypertrophy, Cardiovascular Disease, Cardiac Arrhythmia
Lecture 6
Chapters 3-5
The Cardiovascular Stress Response Step 2
- endothelial cells help to pump blood
- secrete nitric oxide which helps to secrete blood
The Cardiovascular Stress Response Step 3
- Water helps blood to remain viscous
- Body re-absorbs water via vasopressin (anti-diuretic)
- On diuretic, makes you pee all the time
- Athletes – you need water, WHY?
o Water helps to get oxygen, nutrients to muscles
- Why pee your pants if you are really stressed?
o Dead weight
o Because bladder is uni-directional
▪ Nothing can go back
▪ Can only go one way out
The Cardiovascular Stress Response Recovery
- shutting down the stress-response system
Chronic Stress and Cardio Disease
- can lead to cardiovascular disease over time
- What is high BP?
o 140/90
- Why is blood pressure going up?
o Obesity/lack of exercise
- Step 2
o Vulnerable part of a capillary
▪ The intersections between them
▪ They are branches
• Risky part because anytime you have a branch have a thinner spot, and have
huge amount of blood pressure pumping in trying to split off
o Putting a lot of pressure on it
o Very difficult to control
▪ As hypertension goes on, those vessels become more resistant
• Increases blood pressure even more
o Become hardened
▪ Vascular resistance – do’t ope ad shut
flexibly
- Step 3
o Left ventricular hypertrophy
▪ Lop-sided part
• Results in irregular heartbeat
o Super strong predictor of cardiovascular disease
o Bifurcation – where capillaries meet
o As hypertension continues, pits and tears along artery walls
- Step 4
o Pits and tears can happen on the outside of the vessel
▪ As well as the endothelial cells
o CRP
▪ Indicator of inflammation
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Document Summary
Endothelial cells help to pump blood secrete nitric oxide which helps to secrete blood. On diuretic, makes you pee all the time. Athletes you need water, why: water helps to get oxygen, nutrients to muscles. Why pee your pants if you are really stressed: dead weight, because bladder is uni-directional, nothing can go back, can only go one way out. The cardiovascular stress response recovery shutting down the stress-response system. Chronic stress and cardio disease can lead to cardiovascular disease over time. Why is blood pressure going up: obesity/lack of exercise. Increases blood pressure even more: become hardened, vascular resistance do(cid:374)"t ope(cid:374) a(cid:374)d shut flexibly. Step 3: left ventricular hypertrophy, lop-sided part, results in irregular heartbeat, super strong predictor of cardiovascular disease, bifurcation where capillaries meet, as hypertension continues, pits and tears along artery walls. Step 4: pits and tears can happen on the outside of the vessel, as well as the endothelial cells, crp.
